Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752446Ab3FBHrC (ORCPT ); Sun, 2 Jun 2013 03:47:02 -0400 Received: from mailout10.t-online.de ([194.25.134.21]:36590 "EHLO mailout10.t-online.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750805Ab3FBHqx (ORCPT ); Sun, 2 Jun 2013 03:46:53 -0400 Message-ID: <51AAF869.8050906@t-online.de> Date: Sun, 02 Jun 2013 09:46:49 +0200 From: Knut Petersen User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130510 Thunderbird/17.0.6 MIME-Version: 1.0 To: linux-kernel@vger.kernel.org CC: intel-gfx Subject: [BUG 3.9.4] pipe_off wait timed out Content-Type: multipart/mixed; boundary="------------000208070400070709000406" X-ID: rPDgu-Z68heXxvWqSbw8TSc-GjLMasliIrUBffFoxUOr3o6UTItl+tniUrFiYNJwHd X-TOI-MSGID: ff08838f-b51b-4992-af62-5dd1ec00fbf9 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7538 Lines: 140 This is a multi-part message in MIME format. --------------000208070400070709000406 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit During booting kernel 3.9.4 on an AOpen i915GMm-hfs, Pentium-M Dothan 2GHz, 2GB RAM system the "pipe_off wait timed out" warning was triggered. Reproducibility: low, problem was found only once. cu, Knut --------------000208070400070709000406 Content-Type: text/plain; charset=UTF-8; name="dmesg" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="dmesg" [ 16.276006] ============================================= [ 16.276006] [ INFO: possible recursive locking detected ] [ 16.276006] 3.9.4-main #26 Not tainted [ 16.276006] --------------------------------------------- [ 16.276006] systemd-udevd/259 is trying to acquire lock: [ 16.276006] (hdl->lock){+.+...}, at: [] find_ref_lock+0x1c/0x39 [videodev] [ 16.276006] [ 16.276006] but task is already holding lock: [ 16.276006] (hdl->lock){+.+...}, at: [] v4l2_ctrl_add_handler+0x36/0xa3 [videodev] [ 16.276006] [ 16.276006] other info that might help us debug this: [ 16.276006] Possible unsafe locking scenario: [ 16.276006] [ 16.276006] CPU0 [ 16.276006] ---- [ 16.276006] lock(hdl->lock); [ 16.276006] lock(hdl->lock); [ 16.276006] [ 16.276006] *** DEADLOCK *** [ 16.276006] [ 16.276006] May be due to missing lock nesting notation [ 16.276006] [ 16.276006] 3 locks held by systemd-udevd/259: [ 16.276006] #0: (&__lockdep_no_validate__){......}, at: [] __driver_attach+0x35/0x6f [ 16.276006] #1: (&__lockdep_no_validate__){......}, at: [] __driver_attach+0x41/0x6f [ 16.276006] #2: (hdl->lock){+.+...}, at: [] v4l2_ctrl_add_handler+0x36/0xa3 [videodev] [ 16.276006] [ 16.276006] stack backtrace: [ 16.276006] Pid: 259, comm: systemd-udevd Not tainted 3.9.4-main #26 [ 16.276006] Call Trace: [ 16.276006] [] ? vprintk_emit+0x392/0x3da [ 16.276006] [] __lock_acquire+0xcaa/0x1407 [ 16.276006] [] ? mark_held_locks+0x9e/0xc1 [ 16.276006] [] lock_acquire+0x9b/0xd5 [ 16.276006] [] ? find_ref_lock+0x1c/0x39 [videodev] [ 16.276006] [] ? find_ref_lock+0x1c/0x39 [videodev] [ 16.276006] [] mutex_lock_nested+0x3a/0x255 [ 16.276006] [] ? find_ref_lock+0x1c/0x39 [videodev] [ 16.276006] [] ? mutex_lock_nested+0x213/0x255 [ 16.276006] [] ? mutex_lock_nested+0x23a/0x255 [ 16.276006] [] find_ref_lock+0x1c/0x39 [videodev] [ 16.276006] [] handler_new_ref+0x37/0x148 [videodev] [ 16.276006] [] v4l2_ctrl_add_handler+0x62/0xa3 [videodev] [ 16.276006] [] cx8800_initdev+0x30f/0x66d [cx8800] [ 16.276006] [] ? sub_preempt_count+0x84/0xa1 [ 16.276006] [] ? _raw_spin_unlock_irqrestore+0x44/0x5b [ 16.276006] [] ? __pm_runtime_resume+0x40/0x48 [ 16.276006] [] pci_device_probe+0x5e/0x96 [ 16.276006] [] driver_probe_device+0x83/0x177 [ 16.276006] [] __driver_attach+0x53/0x6f [ 16.276006] [] bus_for_each_dev+0x43/0x6d [ 16.276006] [] driver_attach+0x19/0x1b [ 16.276006] [] ? driver_probe_device+0x177/0x177 [ 16.276006] [] bus_add_driver+0xc3/0x1c0 [ 16.276006] [] ? 0xf8544fff [ 16.276006] [] ? 0xf8544fff [ 16.276006] [] driver_register+0x79/0xf1 [ 16.276006] [] ? __raw_spin_lock_init+0x26/0x49 [ 16.276006] [] ? 0xf8544fff [ 16.276006] [] __pci_register_driver+0x4a/0x4d [ 16.276006] [] cx8800_init+0x26/0x1000 [cx8800] [ 16.276006] [] do_one_initcall+0x6f/0x10e [ 16.276006] [] ? 0xf8544fff [ 16.276006] [] load_module+0x164f/0x1931 [ 16.276006] [] sys_init_module+0x70/0x85 [ 16.276006] [] syscall_call+0x7/0xb [ 16.498868] ------------[ cut here ]------------ [ 16.501906] WARNING: at drivers/gpu/drm/i915/intel_display.c:984 intel_wait_for_pipe_off+0x149/0x154() [ 16.509753] Hardware name: [ 16.518599] pipe_off wait timed out [ 16.521005] cx88[0]/0: registered device video0 [v4l2] [ 16.523303] Modules linked in: videobuf_dvb dvb_core ir_lirc_codec lirc_dev ir_rc5_decoder rc_hauppauge snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_pcm_oss snd_pcm snd_seq tuner snd_timer snd_seq_device snd_mixer_oss cx8802(+) cx8800(+) cx88xx snd v4l2_common videodev rc_core tveeprom videobuf_dma_sg videobuf_core btcx_risc soundcore snd_page_alloc [ 16.530840] Pid: 379, comm: plymouthd Not tainted 3.9.4-main #26 [ 16.537675] Call Trace: [ 16.542841] [] warn_slowpath_common+0x68/0x7f [ 16.546954] [] ? intel_wait_for_pipe_off+0x149/0x154 [ 16.550899] [] warn_slowpath_fmt+0x2b/0x2f [ 16.554127] cx88[0]/0: registered device vbi0 [ 16.556917] [] intel_wait_for_pipe_off+0x149/0x154 [ 16.559594] [] intel_tv_mode_set+0x4c4/0x620 [ 16.566720] [] __intel_set_mode+0x595/0x6b1 [ 16.572037] [] ? mark_held_locks+0x9e/0xc1 [ 16.574734] [] intel_set_mode+0x17/0x2f [ 16.580456] [] intel_get_load_detect_pipe+0x2b4/0x308 [ 16.586534] [] ? __mutex_unlock_slowpath+0xda/0xf4 [ 16.591214] [] ? trace_hardirqs_on_caller+0x107/0x156 [ 16.594205] [] ? trace_hardirqs_on+0xb/0xd [ 16.598037] [] intel_tv_detect+0xd1/0x3ea [ 16.601102] [] drm_helper_probe_single_connector_modes+0xa0/0x263 [ 16.603877] [] drm_mode_getconnector+0xc2/0x2a8 [ 16.608327] [] ? might_fault+0x2e/0x6c [ 16.611095] [] ? drm_mode_getcrtc+0xac/0xac [ 16.614837] [] drm_ioctl+0x27c/0x32b [ 16.618451] [] ? drm_mode_getcrtc+0xac/0xac [ 16.621830] cx88/2: cx2388x dvb driver version 0.0.9 loaded [ 16.625248] [] ? tcp_urg+0xa0/0x17b [ 16.627977] cx88/2: registering cx8802 driver, type: dvb access: shared [ 16.632029] cx88[0]/2: subsystem: 0070:6906, board: Hauppauge WinTV-HVR4000(Lite) DVB-S/S2 [card=69] [ 16.634894] cx88[0]/2: cx2388x based DVB/ATSC card [ 16.639982] [] ? drm_copy_field+0x54/0x54 [ 16.643313] [] vfs_ioctl+0x20/0x2a [ 16.646196] cx8802_alloc_frontends() allocating 1 frontend(s) [ 16.649368] [] do_vfs_ioctl+0x42d/0x46b [ 16.656996] [] ? __do_page_fault+0x3fb/0x480 [ 16.662587] [] ? rcu_irq_exit+0x73/0x81 [ 16.666473] [] ? trace_hardirqs_on_thunk+0xc/0x10 [ 16.671748] [] sys_ioctl+0x41/0x62 [ 16.675890] DVB: registering new adapter (cx88[0]) [ 16.679319] [] ? tcp_urg+0xa0/0x17b [ 16.682249] cx88-mpeg driver manager 0000:05:05.2: DVB: registering adapter 0 frontend 0 (Conexant CX24116/CX24118)... [ 16.690170] [] syscall_call+0x7/0xb [ 16.693783] [] ? tcp_urg+0xa0/0x17b [ 16.696926] [] ? tcp_urg+0xa0/0x17b [ 16.700903] ---[ end trace d6a6a8489005d7da ]--- --------------000208070400070709000406-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/